abi.go

package uos

import (
	"encoding/json"
	"fmt"
	"io"
)

// see: libraries/chain/contracts/abi_serializer.cpp:53...
// see: libraries/chain/include/uosio/chain/contracts/types.hpp:100
type ABI struct {
	Version          string            `json:"version"`
	Types            []ABIType         `json:"types,omitempty"`
	Structs          []StructDef       `json:"structs,omitempty"`
	Actions          []ActionDef       `json:"actions,omitempty"`
	Tables           []TableDef        `json:"tables,omitempty"`
	RicardianClauses []ClausePair      `json:"ricardian_clauses,omitempty"`
	ErrorMessages    []ABIErrorMessage `json:"error_messages,omitempty"`
	Extensions       []*Extension      `json:"abi_extensions,omitempty"`
	Variants         []VariantDef      `json:"variants,omitempty" uos:"binary_extension"`
}

func NewABI(r io.Reader) (*ABI, error) {
	abi := &ABI{}
	abiDecoder := json.NewDecoder(r)
	err := abiDecoder.Decode(abi)
	if err != nil {
		return nil, fmt.Errorf("read abi: %s", err)
	}

	return abi, nil

}
func (a *ABI) ActionForName(name ActionName) *ActionDef {
	for _, a := range a.Actions {
		if a.Name == name {
			return &a
		}
	}
	return nil
}

func (a *ABI) StructForName(name string) *StructDef {
	for _, s := range a.Structs {
		if s.Name == name {
			return &s
		}
	}
	return nil
}

func (a *ABI) TableForName(name TableName) *TableDef {
	for _, s := range a.Tables {
		if s.Name == name {
			return &s
		}
	}
	return nil
}

func (a *ABI) VariantForName(name string) *VariantDef {
	for _, s := range a.Variants {
		if s.Name == name {
			return &s
		}
	}
	return nil
}

func (a *ABI) TypeNameForNewTypeName(typeName string) (resolvedTypeName string, isAlias bool) {
	for _, t := range a.Types {
		if t.NewTypeName == typeName {
			return t.Type, true
		}
	}
	return typeName, false
}

type ABIType struct {
	NewTypeName string `json:"new_type_name"`
	Type        string `json:"type"`
}

type StructDef struct {
	Name   string     `json:"name"`
	Base   string     `json:"base"`
	Fields []FieldDef `json:"fields,omitempty"`
}

type FieldDef struct {
	Name string `json:"name"`
	Type string `json:"type"`
}

type ActionDef struct {
	Name              ActionName `json:"name"`
	Type              string     `json:"type"`
	RicardianContract string     `json:"ricardian_contract"`
}

// TableDef defines a table. See libraries/chain/include/uosio/chain/contracts/types.hpp:78
type TableDef struct {
	Name      TableName `json:"name"`
	IndexType string    `json:"index_type"`
	KeyNames  []string  `json:"key_names,omitempty"`
	KeyTypes  []string  `json:"key_types,omitempty"`
	Type      string    `json:"type"`
}

// VariantDef defines a variant type. See libraries/chain/include/uosio/chain/contracts/types.hpp:78
type VariantDef struct {
	Name  string   `json:"name"`
	Types []string `json:"types,omitempty"`
}

// ClausePair represents clauses, related to Ricardian Contracts.
type ClausePair struct {
	ID   string `json:"id"`
	Body string `json:"body"`
}

type ABIErrorMessage struct {
	Code    Uint64 `json:"error_code"`
	Message string `json:"error_msg"`
}